【Highest Quality Standard】Vernier caliper, finely polished stainless steel frame with knurled roller and locking screw to ensure smooth running and precise positioning during use. With hardened process, no rust, more durable, longer service life. 【Precise Measurement】Digital caliper measures up to 6 inches/150 mm with an accuracy of 0.01 mm. This allows you to zero and start a new measurement. Any point on the scale and instant conversion between inches/millimeters with 4 measuring functions: inner diameter, outer diameter, depth, and scale. A large, easy-to-read LCD display shows the measured values in inch or millimeter format. 【Versatility】This professional digital caliper measures inside, outside, and depth measurements. Pitch with two sets of jaws and the "zero" button, we can reset the value during the measurement for more flexibility in use. [Bonus] The digital caliper is equipped with a 1.5V LR44 button cell battery.